Very good point, Oakleaf. After a hysterectomy, it's likely that you have a weak core (but I don't know, maybe you're a Pilates queen!). If you do have a weak core, that could certainly contribute to soreness and pain--in the seat area as well as shoulders, arms, neck, wrists, and hands. And back.

You say you've always had saddle pain--ouch! It doesn't have to be that way!
You didn't mention if you are riding the same bike, set up the same way. Have you changed any components?

If you have not had your bike professionally fit (tweaked just for you), then I would say that would be the first step, along with serious core strengthening. You may need a different saddle, too.

I hope you get it sorted out soon. It's no fun to ride an uncomfortable bike, much less a painful one.

Juliellen